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Plate Tectonics Day 2. Just for fun Scrat and Continental Drift-Ice Age 4 Pangaea’s Moving Farther Apart Again Song The Continental Drift Song (Breaking Up Is Hard to Do). Review. Plate tectonic Theory http://www.odsn.de/odsn/services/paleomap/animation.html

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Plate tectonics day 2
Plate Tectonics Day 2

  • Just for fun Scrat and Continental Drift-Ice Age 4

  • Pangaea’s Moving Farther Apart Again Song

  • The Continental Drift Song (Breaking Up Is Hard to Do)


Review
Review

  • Plate tectonic Theory

    http://www.odsn.de/odsn/services/paleomap/animation.html

  • Surface of earth made of rigid “plates”

  • Float on asthenosphere and is in constant motion

  • Explains

    Drifting continents

    Mountain building

    Earthquakes

    Volcanic activity





Constructive forces help build land
Constructive ForcesHelp build land

There are 3Types of Boundaries

And 1 undifined

Click picture for video

http://www.learner.org/interactives/dynamicearth/plate.html


Divergent Boundaries

http://www.learner.org/interactives/dynamicearth/slip3.html

  • Boundary between two plates that are moving apart or rifting

     

  • RIFTING causesSEAFLOOR SPREADING


Pull apart
Pull Apart

platessplit; hot molten rock from the mantle rises, cools and causes the floor to spread.

Ex. The Mid-Atlantic Ridge


Divergent boundary
Divergent Boundary

Iceland Divided



Convergent boundaries http www learner org interactives dynamicearth slip2 html
Convergent Boundarieshttp://www.learner.org/interactives/dynamicearth/slip2.html

  • Boundaries between two plates that are colliding

     


Collide
Collide

platescrash into one another and form mountains over millions of years.

Ex. The Himalayas



Subduction http www learner org interactives dynamicearth slip2 html
Subductionhttp://www.learner.org/interactives/dynamicearth/slip2.html

oceanic plates collide with continental plates, and slide beneath them creating trenches.

Ex. Mt. St. Helens


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